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A methodology to determine the optimal size of a wells turbine in an oscillating water column device by using coupled hydro-aerodynamic models

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  • Torres, Fernando R.
  • Teixeira, Paulo R.F.
  • Didier, Eric

Abstract

This paper describes a methodology to determine the optimal size of a Wells turbine to be used in an OWC device taking into account hydro-aerodynamic coupling, performance curves of the turbine and air pressure control by a relief valve. The proposed model, named turbine diameter optimization (TDO) model, considers the movement of the water surface inside the OWC chamber as a piston movement in response to the hydrodynamic forces from the incoming waves. The aerodynamic is based on the first law of thermodynamics applied to the air column of the chamber. The power-pressure curve of the turbine and the air pressure control by relief valve are implemented in the model to determine the turbine power output for several regular incident waves. The TDO model is initially calibrated by a numerical model based on Reynolds-Average-Navier-Stokes (RANS) equations for each wave component of an expected sea state distribution. Thereafter, the power output generated by turbines of several sizes is calculated with lower computational cost (few minutes) in comparison with RANS based models (thousands of hours) in a personal computer. This developed methodology is an important support to the process of turbine sizing for an OWC device for an expected sea state distribution.

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  • Torres, Fernando R. & Teixeira, Paulo R.F. & Didier, Eric, 2018. "A methodology to determine the optimal size of a wells turbine in an oscillating water column device by using coupled hydro-aerodynamic models," Renewable Energy, Elsevier, vol. 121(C), pages 9-18.
    • Handle: RePEc:eee:renene:v:121:y:2018:i:c:p:9-18
    DOI: 10.1016/j.renene.2018.01.003
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    References listed on IDEAS

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    Cited by:

    1. Lorenzo Ciappi & Lapo Cheli & Irene Simonetti & Alessandro Bianchini & Giampaolo Manfrida & Lorenzo Cappietti, 2020. "Wave-to-Wire Model of an Oscillating-Water-Column Wave Energy Converter and Its Application to Mediterranean Energy Hot-Spots," Energies, MDPI, vol. 13(21), pages 1-28, October.
    2. Gonçalves, Rafael A.A.C. & Teixeira, Paulo R.F. & Didier, Eric & Torres, Fernando R., 2020. "Numerical analysis of the influence of air compressibility effects on an oscillating water column wave energy converter chamber," Renewable Energy, Elsevier, vol. 153(C), pages 1183-1193.
    3. Lisboa, Rodrigo C. & Teixeira, Paulo R.F. & Torres, Fernando R. & Didier, Eric, 2018. "Numerical evaluation of the power output of an oscillating water column wave energy converter installed in the southern Brazilian coast," Energy, Elsevier, vol. 162(C), pages 1115-1124.
    4. Didier, Eric & Teixeira, Paulo R.F., 2024. "Numerical analysis of 3D hydrodynamics and performance of an array of oscillating water column wave energy converters integrated into a vertical breakwater," Renewable Energy, Elsevier, vol. 225(C).
    5. Wang, Ru & Cui, Ying & Liu, Zhen & Li, Boyang & Zhang, Yongbo, 2024. "Numerical study on unsteady performance of a Wells turbine under irregular wave conditions," Renewable Energy, Elsevier, vol. 225(C).
    6. Scialò, A. & Henriques, J.C.C. & Malara, G. & Falcão, A.F.O. & Gato, L.M.C. & Arena, F., 2021. "Power take-off selection for a fixed U-OWC wave power plant in the Mediterranean Sea: The case of Roccella Jonica," Energy, Elsevier, vol. 215(PA).
    7. Teixeira, Paulo R.F. & Didier, Eric, 2021. "Numerical analysis of the response of an onshore oscillating water column wave energy converter to random waves," Energy, Elsevier, vol. 220(C).
    8. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Li, Ming, 2022. "Experimental study on the overall performance of a model OWC system under the free-spinning mode in irregular waves," Energy, Elsevier, vol. 250(C).
    9. Carrelhas, A.A.D. & Gato, L.M.C. & Morais, F.J.F., 2024. "Aerodynamic performance and noise emission of different geometries of Wells turbines under design and off-design conditions," Renewable Energy, Elsevier, vol. 220(C).
    10. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Choi, Jongsu & Hyun, Beom-soo, 2021. "An integrated numerical model for the chamber-turbine system of an oscillating water column wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).

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